Stimson Yachts newsletter
At Stimson Yacht Design, we are fortunate to be involved in a wide variety of projects, ranging in both size and application. What keeps this job interesting is that in any given month we may need to look at damage stability for a large power catamaran, seatrial a novel amphibious craft, analyse reams of CFD data, and arrange the sheet leads on a luxury catamaran. This year is looking very exciting, with projects at different stages of design and build all over the world – including another 20m IRC cruiser-racer with Windseeker Yachts in Turkey and a 5.6m composite kit runabout in NZ, both launching in the spring; a range of 10m~14m fuel efficient power boats in design; and a new 10m/35kn production powerboat tooling in China.
29m Power Catamaran
We are pleased to announce our collaboration with Chris Wong, a Shen Zhen-based yacht designer, on this 29m/94ft power catamaran for a Chinese client. SYD is providing the naval architecture, systems schematics, stability and powering analyses for this exciting project. With a 100 tonne lightship mass and top speed of 18kn, the composite engineering for the structure will be carried out by Gurit (Asia Pacific), and the vessel will be classed under Chinese Classification Society rules. The heli-pad forward, the hydraulic tender/diver lift and swim platform are just a few of the interesting features of this yacht.
6m Amphibious Rescue Craft – ARC600
Showing off Kiwi-ingenuity to its best, Auckland-based Orion Marine commissioned SYD to draw a 6m/20ft hull to work in conjunction with their S25 amphibious leg system on an Amphibious Rescue Craft. The design brief for the ARC600 included requirements such as shallow draft, low wash, stability at rest and the ability to absorb a 1 tonne payload.The resulting cathedral hull form draws on our previous experience with landing craft, and attains over 20kn with a single 90hp outboard and two crew aboard, exceeding both speed predictions and handling expectations on seatrials.
26m Sailing Catamaran
Our second large project in collaboration with Chinese yacht designer, Chris Wong, is this 26m sailing catamaran, also for a Chinese client. Intended solely for coastal cruising and short passage making, the yacht features a folding sea-plane deployed from the main boom and a 6m fast tender in the transom, plus a spa pool in the bow. The novel full width cabin on the main deck is Chris Wong’s solution to keeping the overall length down while fitting in the required accommodation. Construction is currently being quoted by a selection of Chinese yards, and we hope to see detail design starting early in 2015, with naval architecture, sailing systems and deck layout falling within SYD’s remit.
New Appendages for 30m Sloop
SYD recently completed an IRC review and the design of a new keel and bulb for the Spirit Yachts 30m sloop SY Gaia. Constrained by the need to re-use the existing cast steel fin and not increase the loads on the keel floors or rig, we proposed a new low drag bulb and a GRP fairing over the original fin to change both the section shape and planform area. Using our in-house CFD and VPP capability we analysed a number of candidates before issuing the files for construction to Branagh Marine Composites in Palma. The cumulative effect of the IRC optimisation and new appendages has been a success – she scored a 2nd in class and 3rd overall at her first outing. We have recently completed a similar analysis for a new rudder for SY Gaia for this winter’s refit. (Pic credit Gianfranco Forza)
by Stimson Yacht Design